The Scenario - You are a young, up and coming player on the ATP Tour. Analysts have put you on their 'one to watch' list, however, they feel you don't posses any major 'weapons', and this could hold you back from being a top player. Disheartened by this news, you trudge off in the rain with no destination in mind, and as the Sun starts to disappear over the horizon and the night sets in, you are approached by a mysterious figure. He gives you the opportunity to possess either Sampras' serve or Federer's forehand for the rest of your career.

Federer is unusually good at taking care of big serves, look at how a great returner like Djokovic fared against Roddick's serve. Roddick hits the serve bigger and has a very good 2nd serve (maybe not as good as Sampras but still one of the best ever) and most importantly he gets a way higher percentage of first serves in than Sampras.